... Why do you need to ask us which bag to purchase.
Perhaps he asked because there's folks here who have been shooting for years and who have tried different bags?
🙄
Lets see...
Black cube shoulder
Green Eagle Creek shoulder*
Dark Green 'Travelsmith' shoulder (w/waist strap)*
Tamrac 610
Tamrac Camera/Laptop backpack
Lowepro Street & Field belt system
Kinesis SLR bag w/shoulder strap
Kinesis belt system
* = probably wasn't sold as a camera bag?
...I think I've tried a few, although as one can see from the above, I've generally preferred a "shoulder" bag, although I've gone to one that has a waist strap. I might consider one of the newer sling bags, but I'm not sure how compatible they would be while carrying a large daypack / small backpack.
Similarly, I've also found that what I like to carry around to shoot is not the same kind of bag that I like to carry through airports. Carrying a laptop also is a contributing factor.
Finally, having all of your lenses in one bag ... can make for a big, ungainly bag that's no fun to carry around. Naturally, its
never a problem when you're first starting out, but evolves into one.
In general, I like to carry a "sachel" sized shoulder bag, which will hold an SLR with a short lens attached and enough extra room in the bag for two accessories. Typically, this will be another 'small' lens and a strobe.
If I'm going to be shooting with my big telephoto, I'll use a dedicated carry bag for that, and then a sachel-sized bag for either a second SLR/lens, or just the lens & misc goodies.
Of course, all of this assumes that I'm travelling some distance with the camera. For shots around the house & yard, the bag stays inside.
-hh
PS: where I'm at today is that I think I want to go to wider straps on my shoulder bags. Probably something in the 1.5" range, maybe higher.